Fix environment tag should say dev (#380)

Creates a new variable for dev environment name and set all relevant
fields to use it.

Signed-off-by: Thanh Ha <thanh.ha@linuxfoundation.org>

Author: zxiiro

arc/aws/391835788720/us-east-1/01_infra/lf-arc-dev-eks.tf

@@ -6,7 +6,7 @@ module "pytorch_arc_dev_eks" {
   source  = "terraform-aws-modules/eks/aws"
   version = "~> 20.37"
 
-  cluster_name    = "lf-arc-dev"
+  cluster_name    = var.arc_dev_environment
   cluster_version = "1.33"
 
   cluster_endpoint_public_access = true
@@ -54,6 +54,6 @@ module "pytorch_arc_dev_eks" {
   subnet_ids = module.arc_runners_vpc.private_subnets
 
   tags = {
-    Environment = var.arc_prod_environment
+    Environment = var.arc_dev_environment
   }
 }

arc/aws/391835788720/us-east-1/01_infra/variables.tf

@@ -3,3 +3,9 @@ variable "arc_prod_environment" {
   type        = string
   default     = "lf-arc-prod"
 }
+
+variable "arc_dev_environment" {
+  description = "development environment prefix"
+  type        = string
+  default     = "lf-arc-dev"
+}